1 | // SPDX-License-Identifier: GPL-2.0-only |
---|---|
2 | /* |
3 | * Copyright 2022, Kajol Jain, IBM Corp. |
4 | */ |
5 | |
6 | #include <stdio.h> |
7 | #include <stdlib.h> |
8 | |
9 | #include "../event.h" |
10 | #include "misc.h" |
11 | #include "utils.h" |
12 | |
13 | extern void thirty_two_instruction_loop(int loops); |
14 | |
15 | /* Instructions */ |
16 | #define EventCode 0x500fa |
17 | |
18 | /* ifm field for any branch mode */ |
19 | #define IFM_ANY_BRANCH 0x0 |
20 | |
21 | /* |
22 | * A perf sampling test for mmcra |
23 | * field: ifm for bhrb any call. |
24 | */ |
25 | static int mmcra_bhrb_any_test(void) |
26 | { |
27 | struct event event; |
28 | u64 *intr_regs; |
29 | |
30 | /* Check for platform support for the test */ |
31 | SKIP_IF(check_pvr_for_sampling_tests()); |
32 | |
33 | /* Init the event for the sampling test */ |
34 | event_init_sampling(e: &event, EventCode); |
35 | event.attr.sample_regs_intr = platform_extended_mask; |
36 | event.attr.sample_type |= PERF_SAMPLE_BRANCH_STACK; |
37 | event.attr.branch_sample_type = PERF_SAMPLE_BRANCH_ANY; |
38 | event.attr.exclude_kernel = 1; |
39 | |
40 | FAIL_IF(event_open(e: &event)); |
41 | event.mmap_buffer = event_sample_buf_mmap(fd: event.fd, mmap_pages: 1); |
42 | |
43 | FAIL_IF(event_enable(e: &event)); |
44 | |
45 | /* workload to make the event overflow */ |
46 | thirty_two_instruction_loop(loops: 10000); |
47 | |
48 | FAIL_IF(event_disable(e: &event)); |
49 | |
50 | intr_regs = get_intr_regs(event: &event, sample_buff: event.mmap_buffer); |
51 | |
52 | /* Check for intr_regs */ |
53 | FAIL_IF(!intr_regs); |
54 | |
55 | /* Verify that ifm bit is set properly in MMCRA */ |
56 | FAIL_IF(get_mmcra_ifm(mmcra: get_reg_value(intr_regs, register_name: "MMCRA"), pmc: 5) != IFM_ANY_BRANCH); |
57 | |
58 | event_close(e: &event); |
59 | return 0; |
60 | } |
61 | |
62 | int main(void) |
63 | { |
64 | return test_harness(mmcra_bhrb_any_test, "mmcra_bhrb_any_test"); |
65 | } |
66 |